Why not just work with the default XML export? One could conceivably write a script that breaks the XML down into individual posts (though such a solution would be off-topic for WPSE), which might be easier than writing a Plugin/custom exporter?
–
Chip BennettMay 23 '12 at 19:58

@samiles: It looks very much as if you wanted to switch to a static blog generator like Jekyll. I suppose you already know this article?
–
mooseDec 31 '13 at 12:27